Just released a new relay implementation:

https://gitea.coracle.social/coracle/punt

This is a narrowly-focused DM relay. It supports negentropy, enforces recipient auth, 16 bits of pow, and evicts events after 3 months. Free for you to use, and free for you to self-host as a personal relay (there is a pubkey whitelist option as well). The goal is to make DMs somewhat more deliverable by providing a sane default — the relays I had been using have slowly been failing to serve messages.

Add it to your (or your client's) NIP 17 messaging relay list at:

wss://messaging.coracle.social